Zigzag harrow



ug 20, 1935- n cz.v M. MlLxLlcAN V 2,011,687

ZIGZAG HARROW Filed May 29, 1955 2. Sheets-Sheet 1 Miilicalz INVENTOR ATroRNU ug. 20, 1935. c. M. MILLICAN 2,011,687

Z I GZAG HARROW Filed May 29, 1935 2 Sheets-Sheet 2 Milloalv INVENTOR ATTORNEY Patented Aug. 20, 1935 vsT/tiras PATENT oFrlcE ZIGZAG HARROW Charles M. Millican, Grapevine, Tex.

Y Application May 29, 1933, Serial No. 673,361

` A, t p 2 claims. (C1. 55-3) invention relates to agricultural implements and :it has particular reference to an implement for cultivating `cotton and other similar row crops.

5. ,Tineprincipal object of the invention is to providfzanimplement for removing foreign vegetat ble growth and forthinning the stand of cotton or. thelikeand generally improving its condition by moving the-soil about the stalks. Y

-jThe invention vcomprehencls the provision of two or z nore'toothed` bars, with means for moving the bars endwise yet constraining them to so move in a relatively parallelplane. The teeth of the bars being equi-distantly spaced and directzeddownwardly into the l soil, are moved'in a teeth' as they are drawn across the rows of vegetation' ina zigzag manner.

,Yet Aanother object of the invention is to provide means for reducing the implement to a rigid harrow in which condition it lis adapted for many uses. l l t V*With the foregoing objects as paramount the invention has particular reference to its salient features' of construction and arrangement of parts which will become manifest as the description proceeds, taken in connection with the accompanying drawings, wherein:

Figure `1 is' a plan viewv of an implement cona structed according to the present invention. I:Fi'gure `isa side elevation onlines .2--2` on Figurel.; i

Figure 3 is a rear elevation, and

Figure 4 is a fragmentary perspective view of the clutch operating device.

Continuing with a more detailed description of the drawings, I designates the wheels of the implement mounted upon an axle 2. The wheels and axle are conventional, but it is understood that the wheels are made rigid with the axle through the medium of ratchets 3, in order that the implement will be inoperative when moved backwards. v

To the axle 2 is connected a frame 4 which extends forwardly to provide a connection for the tongue 5. Bars 6 are secured to the frame 4 and extend rearwardly and support the horizontal beams 'I through the medium of the depending members 8. The forward ends of the beams 'I are suspended by depending members 9 at the front of the machine, as shown in Figure 2 and these members 9 also carry a shaft I0. On one end of the shaft ID is mounted a crank II, to the free end of which is pivotally connected one end of a pitman I2. The connection between the pitman and the member II provides for an adjustment at I3, in order that the throw of the pitman may be lengthened or shortened. The other end of the pitman is connected through the medium of a ball and socket I4 to an arm I5, the arm in turn being joined to stub shaft I6, passing through sleeve I1 and rigidly connected to a bar I8. Two assemblies of shafts, sleeves and bars are provided, the bars I8 being in the parallel relationship shown in Figure 1 and having their ends pivotally connected at I9 tothe parallel bars 20. The bars 20 have secured thereto a multiplicity of spikes or teeth 2l in equi-distantly spaced relationship and the bars 20 are arranged to be raised and lowered in a manner to be presently explained, to raise and lower the teeth relative to the earth.

Mounted upon the shaft I at the forward end of the machine is a sprocket 22, over which passes a chain 23, the latter also surrounding a large sprocket 24 mounted upon` one section of the clutch 25, the latter being freely mounted upon the axle 2. The companion section of the clutch 25 is keyed to the axle 2 and movable relative to the opposing section of the clutch and normally urged to engaged position by means of the spring 26. The clutch fork 2l is pivoted to a bracket 28, as apparent in Figure 1. i

A rod 29 is connected to the free end ofthe yoke 21 and is pivotally joined to a bell crank 30, better seen in Figure 4. In this gure, the bell crank 38; is shown as being pivoted to a; bracket.

3| secured to the frame 4 and disposed at such an angle that an upward pull upon a rod 32 will rock the bell crank and exert a pull upon the rod 29 to move the sliding section of the clutch 25 to disengaged position. The vertical rod 32, shown in Figure 4 is likewise shown at the right in Figure 3 as being connected to the hand lever 33.

'Ihe hand lever 33 is also effective in raising and lowering the toothed bars 20. It will be noted that the lower end of the lever is secured to a horizontal shaft 34 to which is rigidly secured an arm 35. The chain 3S, having a section of spring therein joins the arm 35 to crank 31. See Figmines the heightjto which the toothed bars Inayfhl itse1f the reciprocating bars 20 and the mechanismby which these bars are actuated may ure 2L The crank 3T is a part of a shaft 38 which extends through the upper portion of a yoke 39. Midway between the ends of theV shaft 318 isa rigid armril and depending from the 'outer end of this arm is a chain 4|, the lowerend thereof, being secured to a plate d2, rigidly disposedbetween the beams I. Suitable adjustments are provided for the connection between chain 36 and crank 31 as well as betweenfchain-M and the arm 40. The formeradjustment brings about greater tension upon the raisingfiaird lowering mechanism while the latter adjustment deterbe raised and lowered by the lever'.

When the lever 331is move-d rearwardlyapu'll isexerted upon the chain 36, whichumoves the l y Y pended Vfrom any type of agricultural implement pulling upwardly on the chainlll to raise* the f armsV 37 and i0 in a clockwisedirection, thus toothed bar assembly.

It will he noted in Figure 4 that the rodez isl freely slidablethrough the aperture inthe bell crank 3G .and normally, the lower end ofathe rod 32 is rwellbelow the apertureand during the' initial movement of :the :'lever 33 *toiraise v the toothed bar assembly, ethe lower end: of thev rod 1 32 .is'being moved 'into engagement with. thev bell crankandfas thelever 33 is'nallyvr'novedin the' raising operation`the arm 32 visengaged with and rockstl'ie Ybell :crank 3d toexerta pull uponv the i rod 29 'to z release thev clutchi25. :This arrangeto lower the toothed bars to effect engagement it is desired to use the implement as a rigid harrow,

of-f the teeth 2l 'with thesoilli vDuring thisopera-l tion, the clutch is engaged and as the impleev ment is'Y propelled along,` shaftV |00 is rotated throughfrthe medium of the'chain andsprocket assembly and byvirtue of the connection-'between the pitman l2 andthecrank l l on the shaft l5,

reciprocating 'motionl'is impartedto the bars 20, thus` causingl the 'groups ofv teeth'to move across the rows of vegetation in'a'zigzag fashiong' When the pitrnan i2 is disconnected from thecrank I-|. aridl suspended from some pointon the frame.

In so"'using"th`e implementgthe ends of 'the barsy 2D`may be aflinedfto'allow the teeth of onebarnto yfau i'n the path or these of thel companionY bar or the bars may' ber adjusted soA that thel path of the v teethoi one bar will be interposedbetween;

` the paths ofthosevof the companion bar; l

" When it Sis desired tolincreas'eor decrease the width between the groups of teeth-:Mythe posir`tion of the' U-c'lamps is changedsw'Inligure 2, the clamps 43 are shown inv aiposition to bring the groups of teeth nearerthey axis of'tle: shaft I6.V 'The distance between'the Vgrou'psma'yy be increased by reversing thelposition of one or the` other of the YU`clampslr and :stillf further incases, `vthelatter'positions'may belsfoundifmore desirable. .,j ,1 Y,1 a It is understood that while. the invention has been described as a complete implement Within beembodied-in an attachment,V suitably suswithout de'e'partinglfrom the spirit or intent of e the invention. Moreover, certain Achanges and Vmodiiications vmay be madein the structure kdescribed and shown withoufd'epartingfrom':the

Sp'litfor intent of vthe invention: as set forth in' theifollowing claims therefor. 1 i

What is claimed is:v W

' H1; `Anragricultural implement including/a frame mounted 'on' wheels, `andhavingbea1ns extending 2.l 'agricultural irnplerfneiitfycomprising'y a" wheeled frame having arotatable shaft disposed `forwardly thereofan'd a'pair of beams'connected.

t'o 4'said lsha'ft' and extending rearwardly of ,saidi frame beyond its wheelsjvertical sleeves Acarried by the* ends y ofvr said beams, shafts mounted in saidv sleeves.; andv supporting bars midway offthkfeirends whereby 'saidbars willy 'be maintained inll parallel reiatienshia-spiked bars lpiveted tothe ends'of said Vfirst bars inparallel relationship,- acrank carried'by said flrstshaft, a-second crank' carried by one of said last e mentionedshafts,V a pitmanY arm connecting said shafts',v means Ifor driving said first shaft from the wheels Vof Asaid implement 'to' eiect. 'reciprocativef movement of said spikedbarsand means forvraising andlow'- ering said spiked bars `from' a point on said frame. 

